示例如下：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>鼠标经过给tr换颜色</title>
</head>
<body>
<table align="center" width="100%" border="1" cellspacing="1" cellpadding="1" >
<tr style="cursor:hand " onmousemove="changeTrColor(this)">
<td align="center">1</td>
<td height="20"> 123</td>
<td height="20"> abvx</td>
<td height="20"> 465465</td>
<td height="20">546654654</td>
</tr>
<tr style="cursor:hand " onmousemove="changeTrColor(this)">
<td align="center">1</td>
<td height="20"> 123</td>
<td height="20"> abvx</td>
<td height="20"> 465465</td>
<td height="20">546654654</td>
</tr>
<tr style="cursor:hand " onmousemove="changeTrColor(this)">
<td align="center">1</td>
<td height="20"> 123</td>
<td height="20"> abvx</td>
<td height="20"> 465465</td>
<td height="20">546654654</td>
</tr>
</table>
<script type="text/javascript">
function changeTrColor(obj){
var _table=obj.parentNode;
for (var i=0;i<_table.rows.length;i++){
_table.rows[i].style.backgroundColor="";
}
obj.style.backgroundColor="blue";
}
</script>
</form>
</body>
</html>